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A solution of colourless salt on boiling...

A solution of colourless salt on boiling with excess `NaOH` produces a non-flammable gas. The gas evolution ceases after sometime upon addition of `Zn` dust to the same solution, the gas evolution restarts. The colourless salt (s) is (are).

A

`NH_(4)NO_(3)`

B

`NH_(4)NO_(2)`

C

`NH_(4)Cl`

D

`(NH_(4))_(2)SO_(4)`

Text Solution

Verified by Experts

The correct Answer is:
A, B
`NH_(4)NO_(3)+NaOH to NaNO_(3)+NH_(3)+H_(2)O`
`4Zn+7NaOH+NaNO_(3) to 4Na_(2)ZnO_(2)+NH_(3)+2H_(2)O`.
`NH_(4)NO_(2)+NaOH to NaNO_(2)+NH_(3)+H_(2)O`
`3Zn+5NaOH+NaNO_(2) to 3Na_(2)ZnO_(2)+NH_(3)+H_(2)O`
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